Quantitative studies of single-cell properties in monkey striate cortex. II. Orientation specificity and ocular dominance.

1. Quantitative analyses of orientation specificity and ocular dominance were carried out in striate cortex of the rhesus monkey. 2. Sharpness of orientation selectivity was greater for simple (S type) than for complex (CX type) cells. CX-type cells became more broadly tuned in the deeper cortical layers: S-type cells were equally well tuned throughout the cortex. 3. Sharpness of orientation selectivity for S-type cells was similar at all retinal eccentricities studied (0 degrees - 20 degrees from the fovea):in CX-type cells orientation selectivity decreased slightly with increasing eccentricity. 4. The orientation tuning of binocular cells was similar when mapped separately through each eye. 5. Orientation selectivity and direction selectivity are independent of each other, suggesting that separate neural mechanisms give rise to them. 6. More CX-type cells can be binocularly activated than S-type cells (88% versus 49%). The ocular dominance of S-type cells is similar in all cortical layers: for CX-type cells there is an increase in the number of cells in ocular-dominance category 4 in layers 5 and 6.

[1]  D. Hubel,et al.  Receptive fields, binocular interaction and functional architecture in the cat's visual cortex , 1962, The Journal of physiology.

[2]  G. F. Cooper,et al.  The angular selectivity of visual cortical cells to moving gratings , 1968, The Journal of physiology.

[3]  D. Hubel,et al.  Receptive fields and functional architecture of monkey striate cortex , 1968, The Journal of physiology.

[4]  P. O. Bishop,et al.  Interaction effects of visual contours on the discharge frequency of simple striate neurones , 1971, The Journal of physiology.

[5]  Poggio Gf.  Spatial properties of neurons in striate cortex of unanesthetized macaque monkey. , 1972 .

[6]  Henry Gh,et al.  Striate neurons: receptive field organization. , 1972 .

[7]  D. Hubel,et al.  Laminar and columnar distribution of geniculo‐cortical fibers in the macaque monkey , 1972, The Journal of comparative neurology.

[8]  P. O. Bishop,et al.  Orientation specificity and response variability of cells in the striate cortex. , 1973, Vision research.

[9]  B. Brooks,et al.  Neuronal Physiology of the Visual Cortex , 1973 .

[10]  D. Hubel,et al.  Sequence regularity and geometry of orientation columns in the monkey striate cortex , 1974, The Journal of comparative neurology.

[11]  P. O. Bishop,et al.  Orientation specificity of cells in cat striate cortex. , 1974, Journal of neurophysiology.

[12]  J R Bartlett,et al.  Response of units in striate cortex of squirrel monkeys to visual and electrical stimuli. , 1974, Journal of neurophysiology.

[13]  B. Dow.  Functional classes of cells and their laminar distribution in monkey visual cortex. , 1974, Journal of neurophysiology.

[14]  P. Schiller,et al.  Quantitative studies of single-cell properties in monkey striate cortex. III. Spatial frequency. , 1976, Journal of neurophysiology.

[15]  P. Schiller,et al.  Quantitative studies of single-cell properties in monkey striate cortex. I. Spatiotemporal organization of receptive fields. , 1976, Journal of neurophysiology.

[16]  C. Blakemore,et al.  An analysis of orientation selectivity in the cat's visual cortex , 1974, Experimental Brain Research.

[17]  K. Toyama,et al.  An intracellular study of neuronal organization in the visual cortex , 2004, Experimental Brain Research.